NDLI: A high efficiency hybrid resonant PWM zero-voltage-switching full-bridge DC-DC converter for electric vehicle battery chargers

Content Provider	IEEE Xplore Digital Library
Author	Bin Gu Chien-Yu Lin BaiFeng Chen Dominic, J. Cong Zheng Jih-Sheng Lai
Copyright Year	2013
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan (Chien-Yu Lin) \|\| Dept. of Electr. & Comput. Eng., State Univ., Blacksburg, VA, USA (Bin Gu; BaiFeng Chen; Dominic, J.; Cong Zheng; Jih-Sheng Lai)
Abstract	This paper presents a high-efficiency zero-voltage-switching (ZVS) dc-dc converter combing resonant and pulse-width-modulation (PWM) power conversions for electric vehicle battery chargers. A half-bridge LLC circuit, which operates at series resonant frequency, shares the lagging-leg with a phase-shift-full-bridge (PSFB) dc-dc circuit to guarantee ZVS of the lagging-leg switches of the full bridge from zero to full load. A secondary-side hybrid-switching circuit, which is formed by the leakage inductance, output inductor of the PSFB dc-dc circuit, a small additional resonant capacitor and two additional diodes, is incorporated at the secondary side of the PSFB dc-dc circuit. With the hybrid-switching circuit providing a clamp path, the voltage overshoots that arise during the turn-off of the rectifier diodes are eliminated and the voltage stress of bridge rectifier is clamped to the minimal achievable value, which is equal to secondary-reflected input voltage of the transformer. The sum of the output voltage of LLC resonant circuit and the resonant capacitor voltage of the hybrid-switching circuit is applied between the bridge rectifier and the output inductor of the PSFB dc-dc circuit during the freewheeling phases. As a result, the primary-side circulating current of the PSFB dc-dc circuit is instantly reset to zero achieving minimized circulating losses. The experimental results based on a 4 kW prototype circuit show 98.6% peak efficiency and high efficiency over wide load and output voltage ranges.
Sponsorship	IEEE Power Electron. Soc.
Starting Page	23
Ending Page	30
File Size	1364515
Page Count	8
File Format	PDF
ISBN	9781467343541
ISSN	10482334
e-ISBN	9781467343558
e-ISBN	9781467343534
DOI	10.1109/APEC.2013.6520180
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-03-17
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Zero voltage switching RLC circuits Capacitors Batteries Inductors Switches Stress
Content Type	Text
Resource Type	Article

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